带有https的Windows Phone 8 Webrequest和使用Get的自定义标头 [英] Windows Phone 8 Webrequest with https and custom header using Get

问题描述

嘿大家我正在编写Windows手机8，它是客户端iOS应用程序的副本。我需要能够发送带有自定义标头条目的get请求。使用Windows 8这很容易，但使用Windows PHONE 8我遇到了麻烦。



以下是我所拥有的：

Hey everyone I''m in the process of writing a Windows phone 8 that is a copy of a clients iOS application. I need to be able to send a get request with custom header entries. Using Windows 8 this is easy, however using Windows PHONE 8 I have been having trouble.

Here is what i have:

WebRequest myClient = WebRequest.Create(_devApiUrl + "session/" + _entityKey);

myClient.Headers["Host"] = _host;
myClient.ContentType = "text/json";
myClient.Method = "GET";


myClient.BeginGetResponse(ReadWebRequestCallback, myClient);

然后只是想得到一个回复​​我有这个：

and then just trying to get a response I have this:

private void ReadWebRequestCallback(IAsyncResult callbackResult)
        {
            HttpWebRequest myRequest = (HttpWebRequest)callbackResult.AsyncState;

            if (myRequest != null)
            {
                try
                {
                    HttpWebResponse myResponse = (HttpWebResponse)myRequest.EndGetResponse(callbackResult);
                }
                catch (WebException e)
                {
                    return;
                }
            }
        }

当我执行此代码时，我得到的是：

When I execute this code here is what i get:

An exception of type ''System.Net.ProtocolViolationException'' occurred in System.Windows.ni.dll but was not handled in user code

我真的不确定我需要做什么。非常感谢任何帮助！

I''m really not sure what I need to do here. Any help is greatly appreciated!

推荐答案

嗨=）

*首先，你必须更仔细地处理异步模式！ />
*按照你的方式编码，如何正确地说 - 是旧学校;）

但是，让我们解决你的问题，我要解决它借助称为Rx的第三方工具（WP的反应性扩展）。



所以，让我们定义一些辅助方法：

Hi =)
*First of all you must deal with Async pattern more carefully !!
* Coding the way like you did , how correct to say - is old school ;)
However , let''s fix your problem,i''m going to resolve it with help of third-party tool called Rx (Reactive extension for WP).

So, let''s define few helper methods :

public static IObservable ToResponse(this WebRequest request)
{
    var asyncGetResponse = Observable.FromAsyncPattern(
                            request.BeginGetResponse, request.EndGetResponse);

    return Observable.Defer(asyncGetResponse);
}

public static IObservable ToBytes(this Stream stream)
{
    return
        Observable.Create(
            observer =>
            {
                byte[] buffer = new byte[24];

                var obsReadFactory = Observable.Defer(() => stream.AsReader()(buffer, 0, buffer.Length));

                return Observable
                         .Repeat(obsReadFactory)
                         .Select(i => buffer.Take(i).ToArray())

                         // Subscribe on the thread pool, otherwise the repeat operator will operate during the
                         // call to subscribe, preventing the whole expression to complete properly
                         .SubscribeOn(Scheduler.ThreadPool)

                         .Subscribe(
                             _ =>
                             {
                                 if (_.Length > 0)
                                 {
                                     observer.OnNext(_);
                                 }
                                 else
                                 {
                                     observer.OnCompleted();
                                 }
                             },
                             observer.OnError,
                             observer.OnCompleted
                         );
            }
        );
}

剩下的最后一件事就是处理WebRequest及其正确的请求

And the last thing that remain , is to deal with WebRequest and proper request for it

string url = _devApiUrl + "session/" + _entityKey;
var webRequest = WebRequest.Create(url);
webRequest.Headers["Host"] = _host;
webRequest.ContentType = "text/json";
webRequest.Method = "GET";

webRequest.ToResponse()
          .SelectMany(wr => wr.GetResponseStream().ToBytes())
          .ForEach(b => {
                  //Do some stuff with bytes for example get strings 
                  string data=  Encoding.Default.GetString(b);
                  }));

这篇关于带有https的Windows Phone 8 Webrequest和使用Get的自定义标头的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！